28620726 has 16 divisors (see below), whose sum is σ = 60254400. Its totient is φ = 9038088.

The previous prime is 28620701. The next prime is 28620727. The reversal of 28620726 is 62702682.

It is a super-3 number, since 3×28620726³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28620727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125416 + ... + 125643.

It is an arithmetic number, because the mean of its divisors is an integer number (3765900).

Almost surely, 2^28620726 is an apocalyptic number.

28620726 is an abundant number, since it is smaller than the sum of its proper divisors (31633674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28620726 is a wasteful number, since it uses less digits than its factorization.

28620726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251083.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28620726 is about 5349.8342030384. The cubic root of 28620726 is about 305.8864331440.

It can be divided in two parts, 286 and 20726, that added together give a palindrome (21012).

The spelling of 28620726 in words is "twenty-eight million, six hundred twenty thousand, seven hundred twenty-six".